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Z ′ Portal Dark Matter in the Minimal B-L Model
Author
Source
Advances in High Energy Physics
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-07-15
Country of Publication
Egypt
No. of Pages
12
Main Subjects
Abstract EN
We consider a dark matter scenario in the context of the minimal extension of the Standard Model (SM) with a B-L (baryon number minus lepton number) gauge symmetry, where three right-handed neutrinos with a B-L charge -1 and a B-L Higgs field with a B-L charge +2 are introduced to make the model anomaly-free and to break the B-L gauge symmetry, respectively.
The B-L gauge symmetry breaking generates Majorana masses for the right-handed neutrinos.
We introduce a Z2 symmetry to the model and assign an odd parity only for one right-handed neutrino, and hence the Z2-odd right-handed neutrino is stable and the unique dark matter candidate in the model.
The so-called minimal seesaw works with the other two right-handed neutrinos and reproduces the current neutrino oscillation data.
We consider the case that the dark matter particle communicates with the SM particles through the B-L gauge boson (ZB-L′ boson) and obtain a lower bound on the B-L gauge coupling (αB-L) as a function of the ZB-L′ boson mass (mZ′) from the observed dark matter relic density.
On the other hand, we interpret the recent LHC Run-2 results on the search for a Z′ boson resonance to an upper bound on αB-L as a function of mZ′.
These two constraints are complementary for narrowing down an allowed parameter region for this “Z′ portal” dark matter scenario, leading to a lower mass bound of mZ′≥3.9 TeV.
American Psychological Association (APA)
Okada, Satomi. 2018. Z ′ Portal Dark Matter in the Minimal B-L Model. Advances in High Energy Physics،Vol. 2018, no. 2018, pp.1-12.
https://search.emarefa.net/detail/BIM-1118116
Modern Language Association (MLA)
Okada, Satomi. Z ′ Portal Dark Matter in the Minimal B-L Model. Advances in High Energy Physics No. 2018 (2018), pp.1-12.
https://search.emarefa.net/detail/BIM-1118116
American Medical Association (AMA)
Okada, Satomi. Z ′ Portal Dark Matter in the Minimal B-L Model. Advances in High Energy Physics. 2018. Vol. 2018, no. 2018, pp.1-12.
https://search.emarefa.net/detail/BIM-1118116
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1118116